Why are upcoming Super Nintendo games limited to New 3DS models?

The one game i’m excited to play on my New 3DS XL. Image shamelessly stolen from TechnoBuffalo

Looks like SNES classics Pilotwings, Super Mario World, and F-Zero will be available today in the Nintendo eShop.

Super Mario Kart, Earthbound, and Donkey Kong Country will be available on March 24.

The Legend of Zelda: A Link to the Past, Super Metroid, and Donkey Kong Country 2: Diddy’s Kong Quest will make it to your handheld on April 14th.

Why, though, will these older video games require Nintendo’s latest handheld hardware, the New 3DS and the New 3DS XL?

During today’s Nintendo Direct announcement, Nintendo said that the games will feature a “Pixel Perfect Mode,” which will let the games to be played in their original resolution. I’m unsure why “older” hardware, like the 3DS, 3DS XL and even newer 2DS won’t be able to run these games.

Is it Nintendo trying to push us to all get a New 3DS? Is there some technical reason?